Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a922d30f975467a…

MALICIOUS

PDF

95.0 KB Created: 2021-03-23 21:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c512c7ef570d60b6caa49e4964351432 SHA-1: 4127c868d8f54b2ec9fba9e291f53977775307a7 SHA-256: 4a922d30f975467a396d85e0d9781dc667f9ea175d8eb68c20f7cfff3159b428
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a deceptive purpose. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further payloads or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/123?utm_term=image+slider+jquery+free++for+website
    • http://liketsven.xyz/pizegegilewetutirosifeliec9jv.pdf
    • http://canlisohbetim.net/45126154959u5twm.pdf
    • http://zefutuwukeras.getenjoyment.net/29504152091.pdf
    • http://hydraruzxpnew4af.exchange/como_calcular_rumbo_y_azimut_topografiawdkpo.pdf
    • http://batmbatm.ru/lurolununo4gidd.pdf
    • https://xikunamoveg.weebly.com/uploads/1/3/4/5/134596382/xekovovuv.pdf
    • http://topplafond.xyz/free_navigation_apps_for_android5l0ny.pdf
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/fizajit.pdf
    • https://zijepujalikok.weebly.com/uploads/1/3/1/0/131071164/mupeni-sozoxan-banaluw-fololibepe.pdf
    • http://glossywp.online/85311510046lisu8.pdf
    • http://misujupino.getenjoyment.net/probability_sampling_download.pdf
    • http://witomemu.scienceontheweb.net/sanufafifidazuzinolisate.pdf
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/woropakewinuf.pdf
    • http://jedomagisuw.getenjoyment.net/onkyo_tx_nr636_specs.pdf
    • https://zalovodidana.weebly.com/uploads/1/3/4/0/134040409/96be22a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lopadivupudexa/which_metro_game_to_play_first.pdf
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_d09b2426c4d94a869a4e5277fbe3e708.pdf?index=true
    • http://gakilasefit.myartsonline.com/30819068234.pdf
    • https://s3.amazonaws.com/zobuwubedak/gupubizewijivege.pdf
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_30f0c6f583e44558962b17bf27f725a1.pdf?index=true
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_40127cd3481042c2afca9970028b33f0.pdf?index=true
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_c06b35d210fb418daa599b4800fd4229.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001260b.bin
718ebf09348fdb0449b4b534216cc8dec2e8a405710a6b5be0d3876a6fead33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 5476 bytes
font_01_sfnt_off000138b6.bin
ef3a133c1c23668307ce2363f16394ea48055f96b0011d2a0480fa2e96fbc0b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B6 11128 bytes
font_02_sfnt_off00015e91.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E91 4324 bytes

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